Mitigating write amplification issue of SMR drives via the design of sequential-write-constrained cache
學年 108
學期 1
出版（發表）日期 2019-10-01
作品名稱 Mitigating write amplification issue of SMR drives via the design of sequential-write-constrained cache
作品名稱（其他語言）
著者 Yu-Pei Liang, Shuo-Han Chen, Yuan-Hao Chang, Yong-Chin Lin, Hsin-Wen Wei, Wei-Kuan Shih
單位
出版者
著錄名稱、卷期、頁數 Journal of Systems Architecture: Embedded Software Design 99
摘要 Shingled magnetic recording (SMR) is widely considered as a promising storage technology for fulfilling the capacity requirement of next-generation big data applications. However, owing to the sequential-write constraint imposed by the shingled track layout of SMR drives, random-write requests can only be achieved through read-merge-write operations, which lead to considerable write amplification. An on-disk persistent cache area is used in SMR drives to absorb the random-write requests. However, because of the inherent sequential-write constraint, the on-disk persistent cache area cannot absorb duplicate write traffic through in-place overwriting. Such observation motivates us to propose a sequential-write-constrained cache (SWC2) management to mitigate the write amplification issue of SMR drives with the cached data hotness consideration. The proposed strategy is implemented within the Linux system and the experimental results showed that the overall write latency and cache cleaning latency is reduced by an average of 23.47% and 51.67%, respectively.
關鍵字 Sequential-write-constrained cache;SMR drives;Write amplification
語言 en_US
ISSN
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者
審稿制度 否
國別 USA
公開徵稿
出版型式 ,電子版
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